I have investigated this some more. I will provide a solution for UCK
(Ubuntu Customization Kit) but it might apply to other contexts as well.
It is actually 3 distinct issues:
The main problem is the missing init scripts. This is a result from UCK
deactivating initctl (see also in the output of uck-chroot-rootfs:
"Deactivating initctl..."). This makes invoke-rc.d fail when trying to
run upstart jobs (Ubuntu uses upstart (not init) for the services in
question). The "/etc/init.d/* not found" is a followup error and
actually misleading.
The fix described previously (modifying .prerm/.postinst files) does
work, but it's better to fix it globally and not for each affected
package. I found it's best to do it right in invoke-rc.d. Just change
all "exit 100" to "exit 0" in /usr/sbin/invoke-rc.d (in the chroot!).
That will generally ignore missing init scripts. Don't forget to revert
the change afterwards.
The second problem is the missing /scripts directory ("Can't open
/scripts/casper-functions" error). This can be fixed with the following
command (in the chroot!):
ln -s /usr/share/initramfs-tools/scripts /scripts
The third problem is that the UCK applies a hack on the zz-update-grub
scripts which in my case creates an invalid syntax and thus breaks the
upgrade as well (dependency problems on the linux-image-generic
package). The fix is described in my comment #10.
In order to avoid applying these patches manually each time, I modified
UCK to apply it when entering chroot, and revert it when exiting
(amongst the other stuff that UCK does in these stages). It's all in
/usr/lib/uck/remaster-live-cd.sh.
I made a fork of the UCK source code on github and applied the changes.
You may just get the follwing file
https://raw.githubusercontent.com/jox/UCK/master/libraries/remaster-
live-cd.sh
and replace your /usr/lib/uck/remaster-live-cd.sh with it (this time
*not* in the chroot...).
You might also apply the attached patch as follows:
$ cd /usr/lib/uck
$ sudo patch -p2 remaster-live-cd.sh.bak < \
/path/to/fix-uck-missing-initd-scripts-1.patch
(The path in the patch is different since it is from the source code. Running
patch with -p2 from the directory the file is located will apply it properly.)
You may view the changes on github as well:
Fixed missing /scripts dir in chroot.
https://github.com/jox/UCK/commit/2f14005cd47845d7496e6a2b1bdd72a553fd6be2
Fixed "grub-probe postinst/postrm hack" in chroot.
https://github.com/jox/UCK/commit/d2e2ffbbae80392357b8bf442d28678f9298c52a
Added hack to invoke-rc.d in chroot to ignore missing init scripts.
https://github.com/jox/UCK/commit/4c8277459c42f089fd73e6ae9a25d3e73177f491
Hope this helps
** Patch added: "Patch to apply fixes to /usr/lib/uck/remaster-live-cd.sh"
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1325142/+attachment/4190563/+files/fix-uck-missing-initd-scripts-1.patch
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https://bugs.launchpad.net/bugs/1325142
Title:
failure to update libpam-systemd in 14.04 due to missing logind init
script
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